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针对多跳无线网络中信道衰落和业务突发性导致的信道浪费与超负载问题,提出了多跳无线网络跨层自适应协同时分多址接入协议.该协议通过利用路由层周期性更新拓扑的特点,获知信道的中断概率和位置信息,在不增加额外协商开销和保证信息传输效率的前提下自适应判断是否作为协同中继,从而减少了等待延时,提高了信道利用率.通过建立跨层自适应协同时分多址接入协议的马尔科夫链数学分析模型,从理论上分析了协议在吞吐量、丢包率和延时方面的性能.理论和仿真结果显示,与传统时分多址接入协议相比,提升了网络性能,吞吐量最大增加了36%,延时降低了40%.
Aiming at the problem of channel waste and overload caused by channel fading and service bursty in multi-hop wireless networks, a multi-hop wireless network cross-layer adaptive cooperative time division multiple access protocol is proposed. By using the routing layer to periodically update the topology , We know the channel interruption probability and location information and adaptively determine whether it acts as a cooperative relay without increasing the additional negotiation overhead and guaranteeing information transmission efficiency so as to reduce the waiting delay and improve the channel utilization. The performance of the protocol in terms of throughput, packet loss rate and delay is theoretically analyzed by using Markov chain mathematic analysis model of cross-layer adaptive cooperative time division multiple access protocol.Theoretical and simulation results show that compared with the traditional time-division multiple Compared with the site access protocol, network performance is improved, the maximum throughput increased by 36%, delay reduced by 40%.